I live in Visitacion Valley...in the neighborhood south of Portal neighborhood (Mansell Avenue to Bayshore). That area in Visitation Valley is quite lovely and has some of the LOWEST crime rates in San Francisco with great views of the Easy Bay, Downtown, and San Bruno Mountain. (Yes, the area around Sunnydale Projects is higher crime, but that is quite a ways away from this part of VV.)
This neighborhood is majority Asian families who maintain their properties and are good neighbors.
I've lived in that neighborhood for 10 years.